@JJ: True, can be tight under there if you have minimal spacers under your stem. The less cable means less weight also, seeing as how brake cable is like 50g per meter or something around there, this might reduce 1-4 grams off brake cable housing.

@ Anonymous #2: True, I just weighed a 10 mm carbon spacer (which is about the exact same stack height of the front cable stop) and it weighs 3.7 grams, so you'll save 21 plus a little because of the shorter cable as mentioned above.